Finding the Third Proportional to 3,980,307 and 8,705,864

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980,307 : 8,705,864 = 8,705,864 : x
2. Step 2: Convert to fraction form
   3,980,307/8,705,864 = 8,705,864/x
3. Step 3: Cross multiply
   3,980,307x = 8,705,864 × 8,705,864
4. Step 4: Simplify right side
   3,980,307x = 75,792,067,986,496
5. Step 5: Solve for x
   x = 75,792,067,986,496/3,980,307
6. Step 6: Final answer
   x = 19,041,764.36